2 files changed, 39 insertions, 0 deletions

diff --git a/drivers/media/video/gspca/m5602/m5602_bridge.h b/drivers/media/video/gspca/m5602/m5602_bridge.h
index 51376e2a902d..a3f3b7a0c7e7 100644
--- a/drivers/media/video/gspca/m5602/m5602_bridge.h
+++ b/drivers/media/video/gspca/m5602/m5602_bridge.h
@@ -136,4 +136,7 @@ int m5602_write_bridge(
 int m5602_write_sensor(struct sd *sd, const u8 address,
                        u8 *i2c_data, const u8 len);
 
+int m5602_read_sensor(struct sd *sd, const u8 address,
+                      u8 *i2c_data, const u8 len);
+
 #endif
diff --git a/drivers/media/video/gspca/m5602/m5602_core.c b/drivers/media/video/gspca/m5602/m5602_core.c
index d69e3c4ff97d..aaba42058181 100644
--- a/drivers/media/video/gspca/m5602/m5602_core.c
+++ b/drivers/media/video/gspca/m5602/m5602_core.c
@@ -80,6 +80,42 @@ int m5602_write_bridge(struct sd *sd, u8 address, u8 i2c_data)
         return (err < 0) ? err : 0;
 }
 
+int m5602_read_sensor(struct sd *sd, const u8 address,
+                       u8 *i2c_data, const u8 len)
+{
+        int err, i;
+
+        do {
+                err = m5602_read_bridge(sd, M5602_XB_I2C_STATUS, i2c_data);
+        } while ((*i2c_data & I2C_BUSY) && !err);
+
+        err = m5602_write_bridge(sd, M5602_XB_I2C_DEV_ADDR,
+                                 sd->sensor->i2c_slave_id);
+        if (err < 0)
+                goto out;
+
+        err = m5602_write_bridge(sd, M5602_XB_I2C_REG_ADDR, address);
+        if (err < 0)
+                goto out;
+
+        err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x10 + len);
+        if (err < 0)
+                goto out;
+
+        err = m5602_write_bridge(sd, M5602_XB_I2C_CTRL, 0x08);
+        if (err < 0)
+                goto out;
+
+        for (i = 0; (i < len) && !err; i++) {
+                err = m5602_read_bridge(sd, M5602_XB_I2C_DATA, &(i2c_data[i]));
+
+                PDEBUG(D_CONF, "Reading sensor register "
+                               "0x%x containing 0x%x ", address, *i2c_data);
+        }
+out:
+        return err;
+}
+
 int m5602_write_sensor(struct sd *sd, const u8 address,
                         u8 *i2c_data, const u8 len)
 {